WorkerFactory.java

/*******************************************************************************
 * Copyright French Prime minister Office/SGMAP/DINSIC/Vitam Program (2015-2019)
 *
 * contact.vitam@culture.gouv.fr
 *
 * This software is a computer program whose purpose is to implement a digital archiving back-office system managing
 * high volumetry securely and efficiently.
 *
 * This software is governed by the CeCILL 2.1 license under French law and abiding by the rules of distribution of free
 * software. You can use, modify and/ or redistribute the software under the terms of the CeCILL 2.1 license as
 * circulated by CEA, CNRS and INRIA at the following URL "http://www.cecill.info".
 *
 * As a counterpart to the access to the source code and rights to copy, modify and redistribute granted by the license,
 * users are provided only with a limited warranty and the software's author, the holder of the economic rights, and the
 * successive licensors have only limited liability.
 *
 * In this respect, the user's attention is drawn to the risks associated with loading, using, modifying and/or
 * developing or reproducing the software by the user in light of its specific status of free software, that may mean
 * that it is complicated to manipulate, and that also therefore means that it is reserved for developers and
 * experienced professionals having in-depth computer knowledge. Users are therefore encouraged to load and test the
 * software's suitability as regards their requirements in conditions enabling the security of their systems and/or data
 * to be ensured and, more generally, to use and operate it in the same conditions as regards security.
 *
 * The fact that you are presently reading this means that you have had knowledge of the CeCILL 2.1 license and that you
 * accept its terms.
 *******************************************************************************/
package fr.gouv.vitam.worker.core.impl;

import fr.gouv.vitam.worker.core.api.Worker;
import fr.gouv.vitam.worker.core.plugin.PluginLoader;

/**
 * WorkerImpl Factory to create workerImpl
 */
public final class WorkerFactory {

    /**
     * INSTANCE
     */
    private static WorkerFactory WORKER_FACTORY;

    /**
     * plugin loader
     */
    private final PluginLoader pluginLoader;

    /**
     * create a new worker factory.
     * @param pluginLoader
     */
    private WorkerFactory(PluginLoader pluginLoader) {
        this.pluginLoader = pluginLoader;
    }

    /**
     * return the only instance of {@link WorkerFactory}. Build the instance at the first call.
     * This method is synchronised, for performance issue, please call only one time.
     *
     * @param pluginLoader
     * @return
     */
    public static synchronized WorkerFactory getInstance(PluginLoader pluginLoader) {
        if (WORKER_FACTORY == null ) {
            WORKER_FACTORY = new WorkerFactory(pluginLoader);
        }
        return WORKER_FACTORY;
    }

    /**
     * @return WorkerImpl
     */
    public Worker create() {
        return new WorkerImpl(pluginLoader);
    }

}